Belgian designer Raf Simons’ collaboration with Eastpak continues to deliver colors, patterns and silhouettes that defy the backpack brand’s heritage. For those who are tired of the typical angular backpack, the RS Sleek Sling is a great alternative. Its pleated front-panel construction opens to a substantial main compartment, emphasizing zipped functionality. But it’s the tweed pattern that makes this bag a little unconventional and ultimately covetable.